Roll grinding and polishing device



July 8. 1924.

J. F. ROGERS ET AL ROLLING MILL MANIPULATOK F led June 5. 1919 2 Sheet eet 1 July 8. 1924.

1,500,336 J. F. ROGERS ET AL ROLLING MILL MANIPULATOR Filed June 5, 1919 2 Sheets-Sheet 2 #1, A A wv/akw Patented July 8, 1924. v UNITED STATES, PATENT omen v HENRY J. HARRIS, or YOUNGSTOWN, 01110.

Application filed May 28, 1923. Serial No. 641,888.

T all whom it may concern:

Be it known that I, HENRY J. HARRIS, a citizen of the United States, residing at Youngstown, in the county of Y Mahoning and State of Ohio, have inventeda certain new and useful Improvement in Roll Grinding and Polishing Devices, of which the following is a full, clear, and exact description.

This invention relates to roll grinding and polishing devices for rolling mills, particularly sheet and tin platemills and has for its object to provide a device which operates during the rolling operation to maintain a smooth surface on the rolls, making it possible to operate the mill continuously for an extended period of time.

The rolls employed in rollingmills when in operation become coated with scale and pitted and roughened due to the severe usage to which they are subjected while heated to a.

high temperature, so that it is necessary from time to time to discontinue the rolling operatlon while the rolls are ground and polhave a reciprocating movement lengthwise sive material engage'the roll'with a substantially uniform pressure.

Oneofthe main objects of the present invention is the provision of the polishing element which will automatically conform to of, the roll and that all portions of the abra- I the surface of the rolls and engage the same 7 with substantially] uniform pressure at all points regardless of the curvature of the of an attachment which can be easily applied to mills of standard construction with out any material alterations thereto.

Other objects will be apparent from the;

following description and accompanying drawings. I

The following description and accompanying drawings set forth in detail certain ished. The polishing is accomplished bymeans embodying the invention, the dis- :5 rubbing the rolls while rotating with blocks closed means, however, constituting but one of abrasive material such as carborundum' of the various mechanical forms in which until the rolls are smooth enough to again he principle of the invention maybe emoperateefiiciently. This grinding and polployed. I ishing operation results in a. considerable Reference should be had to theaccom 80 loss of time and is further objectionable bepanying drawings forming a part of this cause the heat of the rolls is dissipated durspecification in which Fig. 1 is a front 916- ing the polishing operation. vat10n of a rolhng mill wlththeroll pOllSh- Attempt have been made to. rovide de-z ing device applied thereto; Fig. is an end vices for polishing the rolls during the opelevation with the bar rec1procating mecha- I 35 oration of the mill by means of reciprocatnlsm omitted; F 1g- ,3 1S a agmentary end {)0 ing bars held inengagement with the rolls and carrying blocks of abrasive material,

but inall such devices of which I am aware the operation has not been satisfactory for 40 the reason that theengagement of the abrasive material throughout the length of the rolls has not been sufficiently uniform to maintain a uniformly smooth surface on the rolls.

a Therolls of sheet and tin plate mills are so formed that the surfaces thereof are slightly concave from end to end and in operation as the rolls become heated the central portions thereof being hotter gradually 5o expand until the rolls are slightly convex from end to end. In order to obtain an effective polishing action on the rolls it is desirable that the abrasive material be in engagement with the rolls throughout sub- 5 stantially the entire length thereof, that it elevation showing the barreciprocating mechanism; 'Fig. 1 is a detail view showing 1 the flexible polishing bar inside elevation;

Fig. 5 shows a'transverse' section through the bar on a somewhat enlarged scale; Fig.

6 is a detail view showing one of thes'upporting brackets carrying the ,guidelrollers are journaled in the vertical slots 6 in the standards engaged slots 6. The lowerroll 3 isdriven from a spindle 8' through the usual coupling 001 The rolls 2- and 3 have neck portions 4 and 5 at the end thereof whlch which support the shafts upon whichthe v1, the neck portions f1 and being i by bearing blocks 7 within the lar 9. The rolls 2 and 3 are engaged by upper and lower polishing bars 10 and 11, the. upper polishing bar 10 being supported upon the ends of arms 12 and 13 Willtll are fixed to the inner ends of horizontal shafts 14 and '15 supported on the end standards and the lower bar 11 being carried by arms 17 and 18 which are fixed to the inner ends of horizontal shafts 19 and 20 carried by the end standards. A pair of brackets 21 are secured to each of the standards 1 within the slots 6 thereof opposite the bight of the rollers and carry upper and lower concave rollers 22 and 23 between which the shafts 14 and 15 are slidably and rotatably supported, and additional pairs of rollers 24 and 25 between which the shafts 19 and 20 are slidably and rotatably supported beneath the shafts 14 and 15. The-shafts 14, 15, 19 and 20 extend parallel with the axis of the roller projecting at their inner ends in front of the rolls, the shafts 14 and 15 being positioned above the bi ht of the rolls and the shafts 19 and 20' eing positioned below the bight of the rolls so that the passage of sheets through the rolls is not interfered with. The shafts 14, 15, 19 and 20 all project beyond the outer sides of the standards 1 and are provided with means upon the outer sides of the standards for yieldingly turning them in a direction to press the polishing bars 10 and 11 against the rolls. The shafts-19 and 20 have arms 27 and 28 fixed thereto outside the standards and projecting outwardly therefrom. Counterweights 29 and 30 are adjustably mounted upon the arms 27 and 28 and serve to impart a yielding pressure to the ends of the polishing bar 11 which are engaged by the arms 17 and 18. The shafts 14 and 15 have arms 31 and 32 fixed thereto outside vthe standards and extending outwardly above the arms 27 and 28 of the lower shafts 19 and 20. Yielding means for swinging the arms 31 and 32 in an upward direction to press the bar 10 against the upper roll 2 are provided, the yielding means being in the form of a spring attachment. This attachment consists of a pair of coil springs 33 and 34 which are attached at their upper ends to hooks 35 and 36 on the standard 1 and at their lower ends to a bar 37 which is provided with a series of spaced hooks 38 for engagement with the actuating arm for the upper polishing bar. The lower end of the bar 37 has a lower treadle portion 39 so that the-operator can apply the desired tension to the springs 33 and 34 and engage the actuating arm with the proper hook 38 to apply the desired pressure to the polishing bar 11; e

Sufiicient clearance is revidea between the actuating arms of the shafts 14, 15, 19 and 20 and the outer faces of the standards 1 to permit the shafts to have a reciprocating movement in an endwise direction to reciprocate the polishing bars 10 and 11 lengthwise of the rolls. For reciprocating the four shafts and the polishing bars carried thereby, the shafts 14 and 19 have mounted thereon a'pair of vertical bars 40 and 41 which are held against longitudinal movement on the shafts by means of suitable detachable collars 42. Rigidly attached to the vertical bars 40 and 41 between the upper and lower shafts 14 and 19 is a transverse bar 43 which carries a dependim arm 44 which is provided with apair of spaced inwardly projecting pins 45 and 46 which engage with a cam ring 47 attached upon the outside of the coupling collar 9. Upon each revolution of the lower roll 3, the polishing bars 10 and 11 will be moved lengthwise, forwardly and back upon the surface of the rolls, the counterweights 29 and 30 serving to yieldingly hold thepolishing bar 11 in engagement with the lower roll and thesprings 33 and 34 serving to yieldingly hold the upper polishing bar 10 in engagement with the upper roll at all times during the reciprocation thereof. 7

While the surfaces of the polishing bars which engage with the rolls may be of metal or other substance of sufficient hardness to withstand the abrasive action, the

wearing surface is preferably separate from the body of the bar and in sections 20 as not to interfere with the flexing of the bar. As shown herein the two polishing bars are identical in construction and consist of a relatively light flexible channel iron 48 in the channel of which a series of short blocks 49 which may be of abrasive material such as carborundum are mounted, the blocks 49 being held in place in the channel 'by' means of a removable angle strip 50 along one edge of the bar 48 whichis secured in place by means of bolts 51. Bearing plates 52 are attached to the back of the channel bar 48 adjacent the ends thereof and are provided with drilled holes 54 which receive pins 55 upon the ends of the supporting arms. The drilled holes 54 are of slightly greater diameter than the pins 55 so that the polishing bar can rock slightly with respect to the arms to permit the flat outer faces of the blocks 49 to properly engage the rolls. Since the polishing bars are normally held in engagement with the rollsthey will be retained upon the pins 55 of the 1 arms. To remove the polishing bar 11 all that is necessary isto swing the supporting arms outwardly far enough to permit the bar to be lifted therefrom.

In order to cause .the polishing bars to uniformly engage with the rolls throughout their length Ihave provided means for exerting a yielding pressure upon the central ortions of the bars. To this end a thrust member in the form of a bracket 56 carrying a roller 57 is attached to the back of the channel bar 48 atvthe center thereof. A rod 58 is pivotally connected to one of the bearing plates 52 and has a threaded outer end connected by means of a turn buckle 59 with a flexible rod 60 which bears upon the thrust roller 57 and is connected to the opposite bearing plate 52 through a coil spring 61. By adjusting the turn buckle 59, tension of the spring 61 can be adjusted to exert a thrust upon the central thrust member 56 which tends to bow the central portion of the flexible bar 48 inwardly. While the polishing bar is in engagement with the roll, thrust is thu transmitted to the central portion of the bar to maintain the central portion of the bar as well as the end portions thereof in proper engagement with the roll. By reason of the independent pressure applying means at spaced points along the flexible bar, the polishing bar will automatically conform to the endwise curvature of the roll and will be pressed uniformly against the roll throughout its length regardless of the curvature of the roll in an endwise direction and regardless of the position of the polishing bar with respect to the roll.

It is desirable that the polishing bars be of substantially the same length as the rolls and when necessary to provide for the necessary longitudinal movement of the polishing bars, the standards 1 may be provided with notches 62 on their inner sides opposite the ends of the bars 10 and 11 to provide suflicient clearance for the reciprocation of the bars.

Having described my invention, I claim- 1. A roll polishing device for rolling mills, comprising a flexible bar adapted to conform to the longitudinal curvature of the surface of the roll, and means for yieldingly pressing the bar against the roll.

2. A roll polishing device for rolling mills comprising a flexible bar having one face thereof engaging with the roll, means for yieldingly pressing said bar at its ends against the roll, and independent means for yieldingly ressing the central portion of the bar against the roll.

3. A roll polishing device for rolling mills comprising a flexible bar extending lengthwise of the roll and carrying abrasive material on. the face thereof toward the roll, means for imparting an endwise reciprocating movement to the bar. and means for yieldingly pressin said bar against the roll at spaced points a ong the length thereof to cause said bar to conform to the surface of the roll.

4. A roll polishing device for rolling mills comprising a flexible bar having blocks of abrasive material secured along the inner side thereof, and yielding means on the outer side of the bar for bowing the central portion of the bar inwardly.

5. A roll polishing device for rolling mills comprising a flexible bar carrying blocks of abrasive material upon the side thereof which engages the roll, independent means at opposite ends of the bar for yieldingly pressin the bar against the roll and means carrie by the said bar for pressin the central port1on thereof toward the rolfl 6. A roll polishing device for rolling mills comprising a flexible bar engageable with the roll substantially throughout the length of the roll, said bar having blocks of abrasive material upon the inner side thereof which engages the roll, independent means at the opposite ends of the bar for pressing the same against the roll, means carried by the'bar' for pressing the central portion thereof against the roll, and means for reciprocating the bar in an endwise direction.

7. A roll polishing device for rolling mills comprising a flexible bar having blocks of abrasive material secured upon the inner side thereof, a thrust member adjacent the center of the bar on the outer side thereof and an adjustable andyieldable tension member connecting the ends of the bar and bearing upon the thrust member.

8. A roll polishing device for rolling mills comprising a flexible bar having blocks of abrasive material secured upon the inner side thereof, a thrust member adjacent the center of the bar. on the outer side thereof, a tension rod engaging the thrust member, a coil spring connected to one end of the tension rod and "to an end of the flexible bar, and means including a. turnbuckle connecting the tension rod to the opposite end of the bar.

9. In a rolling mill, the combination with the supporting standards for the rolls having vertical slots to receive the necks of the rolls, of brackets secured within the slots of the standards between the necks of the rolls, horizontal shafts slidably and rotatably supported in 'said brackets, arms upon the inner ends of the shafts, a polishing bar carried by said arms, yielding means acting on the shafts to press the polishing bar against one of the rolls, and means connected to one of the shafts to reciprocate the same.

10. In a rolling mill, the combination with the supporting standards for the rolls having vertical slots .to receive the necks of the rolls. of brackets secured to the standards within the slots between the necks of the rolls, upper and lower concave rolls carried by each of the brackets, horizontal shafts slidably and rotatably? sup orted between the rolls, arms uponthe inner ends of the shafts, a polishing bar carried bysald arms, means acting on the shafts to yieldingly press the polishing bar against the noll, and means connected to one of the shafts to reciprocate the same.

11. In a rolling mill, the combination with the supporting standards for the rolls having vertical slots to receive the necks of the rolls, of brackets secured within the slots of the standards'between the necks of the rolls, upper and lower horizontal shafts slida-bly and rotatably supported in said brackets, arms upon the inner ends of the shafts, polishing bars carried by said arms adapted to engage the upper and lower rolls, yielding means acting on said shafts i to turn the same in a direction to press the polishing bars against the rolls, and means connected to the shafts outside one of the standards for reciprocatingthe same.

12. In a rolling mill, the combination with the supporting standards for the rolls having "ertical slots to receive the hooks of the rolls, of brackets secured within the slots of the standards between the necks of the rolls, upper and lower horizontal shafts slidably and rotatably supported in said brackets, arms upon the inner ends of the shafts, polishing bars carried by said arms adapted to engage the upper and lower rolls, yielding means acting upon each of the shafts to turn the same in a direction to press the polishing bars against the rolls, an arm connected t-othe shafts on one of the standards and a cam rotatable with the rolls, horizontal shafts rotatably sup-- ported by said brackets, arms upon the in ner ends of said shafts, a polishing bar ca-rried by the arms and adapted to engage a roll, arms fixed to the shafts outside the standards, and means connected to the arms for yieldingly turningthe shafts in a direction to press the bar against the roll.

14. In a rolling mill, the combination with the roll supporting standards which have vertical slots to receive the necks of the rolls, of brackets secured within the slots of the standards between the necks of the rolls, aligned horizontal shaftssupported by the brackets, arms upon the inner ends of the shafts, a polishing bar carried by the arms and adapted to engage a roll, arms fixed to the shafts outside the standards, and springs connected to the arms and to the standards for yieldingly turning the shafts in a direction to press the polishing bar against the roll.

.In testimony whereof, I hereunto affix my signature.

HENRY. J. HARRIS. 

